Wax-thread sewing-machine.



PATENTED DEC. 15, 1903.

I. N. WHIPPLE. WAX THREAD SEWING MACHINE.

APPLICATION FILED OCT. 31, 1901.

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No. 747,284. PATENTEDDEG. 15, 1903.

A J. N. WHIPPLE, WAX THREAD SEWING MACHINE.

APPLICATION FILED 001231, 1901.

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PATENTED DEG.715, 1903.

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U ITED STATES Patented December 15, 1903.

I ATnNT FFICE" JOEL N. WHIPPLE, OF ST. LOUIS, MISSOURI, ASSIGNOR TOLANDIS MACHINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OFMISSOURI.

WAX-TH READ SEWING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 747,284, dated December15, 1903.

Application filed October 31, 1901. Serial No. 80,625. (No model.)

To all whom it may concern.-

Be it known that I, JOEL N. WHIPPLE, a citizen ofthe United States,residing at the city of St. Louis, State of Missouri, have invented acertain new and useful Improvement in Wax-Thread Sewing-Machines, ofwhich the following is a full, clear, and exact description, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being bad to the accompanying drawings, formingpart of this specification, in which- Figure l is a vertical sectionalview. Fig. 2 is a plan view showing the driving-shaft and its associatemechanism. Fig. 3 is a top plan viewillustrating particularly thethread-carrier and the thread-hook, the work-table of the machine beingremoved. Figs. 4 and 5 are views of the general character of Fig. 3,illustrating the thread-carrier and the threadhook in differentpositions; and Figs. 6, 7,

. and 8 are fragmentary details illustrating different positions of saidthread-carrier and thread-hook with relation to the needle.

This invention relates to a new and useful improvementinsewing-machines, and relates particularly to the stitch-formingmechanism, the primary object being to construct a simple and cheapmachine in which the thread is conveniently presented to the needle.

The invention consists in the various matters hereinafter described andclaimed.

In the accompanying drawings the invention is illustrated as applied toa wax-thread sewing-machine.

In said drawings, 1 indicates the frame of the machine, upon which isarranged a bedplate 10, a box-housing 11 being supported upon saidframe. The main shaft 12 is journaled in bearings provided in the endwalls of said housing, and said shaft has mounted thereon the belt andfly-wheels 13 and the various cams from which the operativemechanism ofthe machineis driven. An apertured plate or work-table 22 is secured atthe upper front edge of the boX-housing, and mounted in bearings atopposite ends of this work-table is a shaft 23, which forms a pivotalsupport for the needle-carrier 24. A lever 30, pivoted to the rear ofthe machine, is provided with a cam-roll which cooperates with the cam16,

and the forward end of said lever is connected by the link 29 with saidneedle-carrier 24, whereby rotation of the said shaft 12 serves toreciprocate the barbed needle 25 through the work-plate in a mannerwhich will be apparent.

Above the box-housing 10 is a head-frame 21, whose forward portioncarries the shuttle 60, said shuttle being of the rotary type and havinga hook 69 and also being adapted to receive a bobbin 67 in awell-understood man- Driving-pinions 61 and 62, journaled upon saidhead-frame, mesh with the toothed periphery of said shuttle and alsowith a mas- 65 ter-gear 63, mounted upon a shaft journaled upon saidhead-frame, while a pitman 66 has one end in connection with a disk 64upon said shaft, which carries said master-gear 63, and its other endhaving an eye in the form 70 of an eccentric-strap, which engages thecam or eccentric 15 upon said main shaft 12. R0- tation of said mainshaft thus serves to rotate the shuttle.

The construction of the shuttle-actuating mechanism just referred towill be found fully described in my Patent No. 730,848, dated June 19,1903.

Pivotally mounted under the worlctable 22 is what may be termed thelower threadbook 37, said thread-hook being formed on the innerperiphery of a segmental skeleton frame. This frame is rocked oroscillated through the medium of a link 38, connected to one member of abell-crank lever 39, the other member of said lever carrying a rollerentering a peripheral groove of the cam 14, mounted upon said main shaft12. A lower thread -carrier 40 is preferably slotted (see Fig. 3) inorder that it may be guided in its 0 movement, and said thread-carrieris connected to one member of a bell-crank lever 41, whose other memberis provided with a roller fitting in a peripheral cam-groove of the cam20, mountedupon said main shaft 12.

What may be termed the upper thread of the machine is carried by thebobbin 67 in a well-understood manner, while the lower thread passesthrough a thread-eye in the free end of the thread-carrier 40 and thenceuproo wardly into the work, as clearly shown in Fig. 6. In the formationof a stitch, when .returns to normal position.

to receive the lower thread for the purpose of drawing the same throughthe work as the needle backs out of the latter, the said lowerthread-carrier tO and the thread-hook 37 are in the positionsillustrated in Figs. 3 and 6- that is to say, the lower thread-carrier40 is in advance of the needle and upon one side of the same, and thethread-hook 37 is at the limit of its throwin one direction and is uponthe same side of the needle as that upon which the eye of the lowerthread-carrier rests. Upon rotation of the main shaft the thread-hook ismoved in what may be termed a forward direction, said hook engaging thethread between thethread-carrier 40 and the work and carrying saidthread in a loop across the needle, as shown in Fig. 7, the positions ofthe thread-hook and thread-carrier being illustrated in Figs. 4 and 7.The upper thread of this loop is the thread which comes from the openingin the work, while the lower thread of said loop is the thread whichcomes from the thread-carrying arm 40. After this horizontal loop isformed the thread-carrying arm 40 moves from the position shown in Fig.4 inwardly to the position shown in Fig. 5, so that the lower thread ofsaid horizontal loop is laid over the barb of the needle. The needle nowrises with the lower thread, and simultaneously with this movement theoscillating hook 37 is rocked backwardly to release the thread, and thethread-carrier 40 also The needle continuing to rise, the loop is drawnthrough the work, as indicated by full lines in Fig. 8, and this loop isthen caught by the shuttle-hook 69 and the stitch is completed in awell-understood manner.

I am aware that minor changes in the construction, arrangement, andcombination of the several parts of my device can be made andsubstituted for those herein shown and described without in the leastdeparting from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

In a sewing-machine, the combination with a barbed needle and itsoperating mechanism, of a reciprocatory thread-carrier movable acrossthe line of the needle at the side of the same, a pivoted skeletonhook-frame into whose opening the needle is adapted to move, athread-hook upon the inner side of said frame, means for rocking saidskeleton frame back and forth upon its pivot to carry the saidthread-hook from one side to the other of said needle and across theface of the same provided with the barb, and means for reciprocatingsaid thread-guide at the side of said needle; substantially asdescribed.

In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 29th day of October, 1901.

JOEL N. WHIPPLE.

Witnesses:

GEORGE BAKEWELL, G. A. PENNINGTON.

